Sharp AH-AP18DR User manual

1
AH/AY-AP18DR
AH/AY-AP24DR
INDOOR UNIT
AH-AP18DR AY-AP18DR
AH-AP24DR AY-AP24DR
OUTDOOR UNIT
MODELS
SERVICE MANUAL
S5305AYAP24DR
SHARP CORPORATION
In the interests of user-safety (Required by safety regulations in some
countries) the set should be restored to its original condition and only
parts identical to those specified should be used.
SPLIT SYSTEM
ROOM AIR CONDITIONERS
AU-A18DR AE-A18DR
AU-A24DR AE-A24DR
TABLE OF CONTENTS
Page
SPECIFICATIONS ............................................................................................................................................. 2
EXTERNAL DIMENSIONS ...............................................................................................................................4
WIRING DIAGRAMS .........................................................................................................................................5
ELECTRICAL PARTS ....................................................................................................................................... 9
MICROCOMPUTER CONTROL SYSTEM .....................................................................................................11
FUNCTIONS ...................................................................................................................................................19
TROUBLESHOOTING GUIDE OF CONTROL CIRCUIT................................................................................ 27
REFRIGERATION CYCLE .............................................................................................................................. 32
PERFORMANCE CURVES ............................................................................................................................34
REFRIGERANT PIPE INSTALLATION WORKS .............................................................................................35
DISASSEMBLING PROCEDURE ...................................................................................................................37
REPLACEMENT PARTS LIST ........................................................................................................................46

AH/AY-AP18DR
AH/AY-AP24DR
2
SPECIFICATIONS
ITEMS INDOOR UNIT OUTDOOR UNIT INDOOR UNIT OUTDOOR UNIT
AY-AP18DR AE-A18DR AY-AP24DR AE-A24DR
Cooling capacity kW 5.2 6.7
Heating capacity kW 5.5 8.1
Moisture removal Liters/h 1.6 2.2
Electrical data
Phase – Single
Rated frequency Hz 50
Rated voltage V 220 – 240
Rated current Cool A 9.2 – 9.3 12.7 – 13.1
Heat A 8.2 – 8.4 13.3 – 13.6
Rated input Cool kW 1.99 – 2.15 2.62 – 2.76
Heat kW 1.77 – 1.93 2.75 – 2.90
Rated factor Cool % 98 – 96 94 – 88
Heat % 98 – 96 94 – 89
Compressor Type Hermetically sealed rotary type
Model 5KS225DAA 5JS315DAB
Oil charge 470cc [RB68A or Freol AlPha68M] 700cc [RB68A or Freol AlPha68M]
Refrigerant system Evaporator Louver fin and Grooved tube type
Condenser Corrgate fin and Grooved tube type
Control Capillary tube
Refrigerant volume (R-410A) 1060g 1550g
De-lce system Micro computer controled reverse sysetm
Noise level High dB(A) 41 52 45 54
(at cooling) Med. dB(A) 36 – 39 –
Low dB(A) 34 – 37 –
Fan system
Drive Direct drive
Air flow quantity High m3/min. 15.7 48 18.3 46
(at cooling) Med. m3/min. 13.9 – 14.7 –
Low m3/min. 11.7 – 13.5 –
Fan Cross flow fan Propeller fan Cross flow fan Propeller fan
Connections
Refrigerant coupling Flare type
Refrigerant tube size Gas, Liquid 1/2", 1/4"
Drain piping mm O.D ø 20
Others
Safety device Compressor: Internal protector Compressor: Internal protector
Fan motors: Thermal protector(Internal)
Fuse, Micro computer control
Air filters Polypropylene net (Washable)
Net dimensions Width mm 1040 (1155) 890 (1020) 1040 (1155) 890 (1020)
(Cartont dimensions) Height mm 325 (300) 645 (735) 325 (300) 645 (735)
Depth mm 220 (385) 327 (398) 220 (385) 327 (398)
Net weight (Gross weight) kg 16 (21) 54 (58) 16 (21) 61 (65)
Note: The condition of star ( ) marked item are ‘ISO5151:1994(E), condition T1’.

3
AH/AY-AP18DR
AH/AY-AP24DR
ITEMS INDOOR UNIT OUTDOOR UNIT INDOOR UNIT OUTDOOR UNIT
AH-AP18DR AU-A18DR AH-AP24DR AU-A24DR
Cooling capacity kW 5.2 6.7
Moisture removal Liters/h 1.6 2.2
Electrical data
Phase – Single
Rated frequency Hz 50
Rated voltage V 220 – 240
Rated current A9.2 – 9.3 12.7 – 13.1
Rated input kW 1.99 – 2.15 2.62 – 2.76
Rated factor %98 – 96 94 – 88
Compressor Type Hermetically sealed rotary type
Model 5KS225DAA 5JS315DAB
Oil charge 470cc [RB68A or Freol AlPha 68M] 700cc [RB68A or Freol AlPha 68M]
Refrigerant system Evaporator Louver fin and Grooved tube type
Condenser Louver fin and Grooved tube typ
Control Capillary tube
Refrigerant volume (R-410A) 910g 1380g
De-lce system Micro computer controled reverse sysetm
Noise level High dB(A) 41 52 45 54
(at cooling) Med. dB(A) 36 – 39 –
Low dB(A) 34 – 37 –
Fan system
Drive Direct drive
Air flow quantity High m3/min. 15.7 48 18.3 46
(at cooling) Med. m3/min. 13.9 – 14.7 –
Low m3/min. 11.7 – 13.5 –
Fan Cross flow fan Propeller fan Cross flow fan Propeller fan
Connections
Refrigerant coupling Flare type
Refrigerant tube size Gas, Liquid 1/2", 1/4"
Drain piping mm O.D ø 20
Others
Safety device Compressor: Internal protector Compressor: Internal protector
Fan motors: Thermal protector(Internal)
Fuse, Micro computer control
Air filters Polypropylene net (Washable)
Net dimensions Width mm 1040 (1155) 890 (1020) 1040 (1155) 890 (1020)
(Cartont dimensions) Height mm 325 (300) 645 (735) 325 (300) 645 (735)
Depth mm 220 (385) 327 (398) 220 (385) 327 (398)
Net weight (Gross weight) kg 16 (21) 51 (55) 16 (21) 60 (64)
Note: The condition of star ( ) marked item are ‘ISO5151:1994(E), condition T1’.

AH/AY-AP18DR
AH/AY-AP24DR
4
EXTERNAL DIMENSIONS
Figure E-1. INDOOR UNIT
Figure E-2. OUTDOOR UNIT
220
950
Power supply cord
(AY-AP18DR, AH-AP18DR only)
[Length unit : mm]
325
1040
Remote controller
58
18.5
22
140
SAVE
MODE
TEMP.
FANIH
SWING CANCELFULL POWER
INVERTER AIR CONDITIONER
TEMP.
MODE
FAN
TIMER
570
645
202
122
320 342
890 29037
30
172 25
62 46.3
10.5
ø4.5

5
AH/AY-AP18DR
AH/AY-AP24DR
WIRING DIAGRAMS
Figure W-1. Wiring Diagram for AY-AP18DR
Figure W-2. Wiring Diagram for AE-A18DR

AH/AY-AP18DR
AH/AY-AP24DR
6
Figure W-3. Wiring Diagram for AY-AP24DR
Figure W-4. Wiring Diagram for AE-A24DR

7
AH/AY-AP18DR
AH/AY-AP24DR
Figure W-5. Wiring Diagram for AH-AP18DR
Figure W-6. Wiring Diagram for AU-A18DR

AH/AY-AP18DR
AH/AY-AP24DR
8
Figure W-7. Wiring Diagram for AH-AP24DR
Figure W-8. Wiring Diagram for AU-A24DR

9
AH/AY-AP18DR
AH/AY-AP24DR
ELECTRICAL PARTS
Part Part Name Items Specifications
No. AY-AP18DR AY-AP24DR
1Terminal Board Rating 300V 25A
2Fan motor Rating 400V 2µF
Capacitor
3Relay-1 Rating AC250V 20A –
(RY1) Coil Volt.; 12V
4Relay-2 Rating AC250V 3A
(RY2, RY3, RY4) Coil Volt.; 12V
5Printed Wiring Material Paper Base Phenolic Resin (UL 94V-0)
Board
6 Transformer Rating Pri 220 - 240VAC Sec. 19.0VDC
7Fan motor Rating 220 - 240VAC 50Hz 41W 4-Pole
Type MLA999
Thermal Protector Cut off 135±10˚C
(Internal)
8Power Supply Rating 3G 1.5mm2–
Cord H05VV-F –
9Louver Motor Rating DC12V
Type MP24GA
Part Part Name Items Specifications
No. AE-A18DR AE-A24DR
1Terminal Board Rating 300V 25A
2Fan motor Rating 450V 3µF 450V 3µF
Capacitor
3Running Rating 400V 50µF 400V 45µF
Capacitor
4Compessor Rating AC220 - 240V 50Hz 1500W AC220 - 240V 50Hz 2200W
Type 5KS225DAA 5JS315DAB
5Fan motor Rating 220 - 240VAC 50Hz 71W 6-Pole 220 - 240VAC 50Hz 75W 6-Pole
Type MLB002 MLB015
Thermal protector Cut off 135˚C±5˚C
(Internal)
6 Relay 5 Rating – AC250V 30A
for Compressor Coil volt: 200 -240VAC

AH/AY-AP18DR
AH/AY-AP24DR
10
Part Part Name Items Specifications
No. AH-AP18DR AH-AP24DR
1Terminal Board Rating 300V 25A
2Fan motor Rating 400V 2µF
Capacitor
3Relay-1 Rating AC250V 20A –
(RY1) Coil Volt.; 12V
4Relay-2 Rating – AC250V 5A
(RY4) Coil Volt.; 12V
5Printed Wiring Material Paper Base Phenolic Resin (UL 94V-0)
Board
6Transformer Rating Pri 220 - 240VAC Sec. 16.8V DC 0.29A
7Fan motor Rating 220 - 240VAC 50Hz 41W 4-Pole
Type MLA999
Thermal Protector Cut off 135±10˚C
(Internal)
8Power Supply Rating 3G 1.5mm2–
Cord Type H05VV-F –
9Louver Motor Rating DC12V 250
Type MP35EA
Part Part Name Items Specifications
No. AU-A18DR AU-A24DR
1Terminal Board Rating 300V 25A
2Fan motor Rating 450V 3µF 450V 3µF
Capacitor
3Running Rating 400V 50µF 400V 45µF
Capacitor
4Compessor Rating AC220 - 240V 50Hz 1500W AC220 - 240V 50Hz 2200W
Type 5KS225DAA 2JS315DAB
5Fan motor Rating 220 - 240VAC 50Hz 71W 6-Pole 220 - 240VAC 50Hz 75W 6-Pole
Type MLB002 MLB015
Thermal protector Cut off 135˚C±5˚C
(Internal)
6 Relay 4 Rating – AC250V 30A
Coil volt: 200 -240V

11
AH/AY-AP18DR
AH/AY-AP24DR
MICROCOMPUTER CONTROL SYSTEM
Figure L-1. Electronic Control Circuit Diagram for AY-AP18DR
15K
L2
R37
MODE
OUTDOOR UNIT
BR
BK
BL
C B A
VALVE
BOARD TERMINAL
3 2
POWER SUPPLY SINGLE PHASE
N
L
TERMINAL BOARD
N 1RY2
3A 250V
T
WPE1
RY1
OUT IN
R38
JP19
JP7
JP8
JP9
NC
NC
NC
NC
R2 R1
2W 2W
SSR2
6
8
C28
275V
0.1µ
0.1µ
275V
275V
CN101
CN102
BCN102
CN103
CN10
56
56
1/2W 1/2W
620 620
2 3 4 5 6 7 8 1 3 2 1
620 620 R106
R105 R104 R103
BCN101
IC101
+
10V
33µ25V
0.1µ
C101 C102
1/2W 1/2W
R101 R102
2.7K
3K
LED103 LED104 LED105 LED106
(FAN AUTO)
(FAN H) (FAN M) (FAN L)
R107
9
65 243 1
(CLUSTER)
LED107
GR BL
21
1
(OPERATION)
LED101 LED102
(TIMER)
23
10
R108
3
D12 0.1µ
1
1K(F)
5 3 1 7 6
R37
8 7 6 5 4 3 2
BCN1
1 1 2 3
C26
+
+
R33 R31
1
0.1µ25V
C16
SW1 : AUX.(TEST RUN)
C12
C27
13K 3.3K
R17
16V 0.01µ
16V 0.01µ
10K
10K
JP18
JP13
JP12
JP11
JP10
10MHz
R11 47K
R12 6.8K
0.01µ 0.01µ 0.01µ
16V 16V 16V 10K
R34 R32
R26
R25 R24
R23
R22
R21
R20
R19
R18
R16
R15
R14
R13
R10
R9
R8
R7
C25
C23
C21
C20
C19 C18 C17C15
C14 C13
C11
C9
C8C6
C5
C4
C3
C2
C1
TR1
0.01µ
16V
25V
0.1µ
6 7 8
3 2 1
IC8
5
4
3.3K
22.6K(F)
GND
D1?4
C7
+
100µ
10V
25V
IC3
0.1µ
7805
47µ 25V
+
IC2
7812
0.1µ
50V
1000µ
35V
+
D7
2.7K(F)
5 3 1
2µ
MOTOR
FAN
TH1 PIPE TEMP. 10kΩ(25˚C) TH2 PIPE TEMP. 15kΩ(25˚C)
1 2 3 4
(F)
10K
(F)
10k
10µ
16V 16V
10µ
10K10K
680
+
1000p
50V
Vss
AVss
AVcc
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
51
50
49
P20
P17
P16
P15
P14
P13
P12
P11
P10
P07
P06
P05
P04
P03
P02
P01
P00
NC
P30
64 63 62 61 60 59 58 57 56 55 54 53 52
P44 P43 P42 P41
P40 P37 P36 P35 P34 P33 P32 P31
P64
P63
P62
P61
P60
AVR
AN7
AN6
AN5
AN4
AN3
AN2
AN1
AN0
P47
P46
P45
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
Vcc
20 21 22 23 24 25 26 27 28 29 30 31 32
RST
MOD0 MOD1
X0 X1 P27 P26 P25 P24 P23 P22 P21
FRONT
OSC1
0.01µ
1K
JP4 JP5
16V 0.01µ
400V
(PATTERN SIDE)
IC1
50V
1µ
0.1µ25V
13K 13K
10K
3
IC6
1
MB89537A
NC
JP1 JP2 JP3
3
2
FAN MOTOR
IC
HOLE
3 2 1
4 5 1 2 3LOUVER
MOTOR
3 5 4 2 1
0.1µ
25V
D6 +
10K(F)
220µ 16V
Q1
2
3
1 1
2
3
9
8IC5
Q3 Q4
470
1/2W
SSR1
RY1
BZ1
1.8K
R28
R29
RY2
RY3
D10
D11
10K
IC4
8
2 11
2SW101
C24
25V
9
10
5V
12V
3
SSR2
R30
470
9
1/2W 2
R27
R4 22K
R5
1
Q2
20K R6
22K
16V
C10
0.01µ
2
16V
C22
0.01µ
2
2
3 32
1
23
D9 D8
13
CLEANING SWITCH 2
SWITCH 1 CLEANING
10K R39 R40
3.3K
R35
CLUSTER
13
2
1
CN1
CN2
CN3
CN5 CN6
CN7 CN8
INTERNAL
THERMOSTAT
CN9
NR1
1 3 1 3
JP21
Q5 Q6
Q7Q8
1W
R43 C33
0.033µ
100 275V
RY3
0.033µ
275V
R42 C32
100
1W
0.033µ
275V 1W
C31
SSR1
L1
100
R41
6.8K 6.8K
NF1
+
C29
47µ
25V
D14
10K
1/2W
R4547
R38
L MODE
COOLHEAT
FAN1 FAN2
R23R21R19
ERTER
CLUS
FAN OUT LOUV
JP19JP18
15K15K6.8KNONENONE
JP6
NONE
TEST
JP13JP12JP11JP10
JP9JP8JP7
NONE NONE NONENONE NONE
2 PIPE
1 PIPE
FAN DRY
E 2 DEIC
E 1 DEIC
13KNONE NONE NONE
JP1 JP5JP4JP3JP2
I
SYMBOL DEF.
HOT KEEP
SWE- AT
WIRE LESS
PWR ON
BL
ORPU
CT1
BL
COMP
FAN
TO

AH/AY-AP18DR
AH/AY-AP24DR
12
Figure L-2. Electronic Control Circuit Diagram for AY-AP24DR
13K
R37
L2L1 MODE
6.8K47K
10K
25V
47µ
C29
+
D14
NF1
6.8K 6.8K
275V
0.033µ
C31 1W
R41
100
L1
RY3
0.033µ
275V
1W
100
RY2
C32
R42
275V
100
0.033µ
275V
1W
C33
R43
RY4
R44
0.01µ
C34
1W
NC
NC
NC
NC
R38
JP19
JP7
JP8
JP9
0.1µ
275V C28
86
SSR2
2W 2W
R1 R2
0.1µ
275V
275V
CN101
CN10 CN102
BCN102
CN103
3
R108
10
32
(TIMER)
LED102 LED101
(OPERATION)
1
12
BL
GR LED107
(CLUSTER)
134256
9
R107
(FAN L) (FAN M) (FAN H)
(FAN AUTO)
LED106 LED105 LED104 LED103
3K
2.7K
R102 R101
1/2W 1/2W
C102
C101
0.1µ
25V
33µ
10V
+
IC101
BCN101
R103 R104 R105 R106
620 620
1 2 3 1 8 7 6 5 4 3 2
620 620
1/2W 1/2W
56
56
D12 0.1µ
820(F)
5 3 1 7 6
Q8 Q7
Q6 Q5
JP21
3 1 3 1
NR1
CN9
THERMOSTAT
INTERNAL
CN8 CN7
CN6 CN5
CN3
CN2
CN1
1
23
1
CLUSTER
R35
3.3K
R40 R39 10K
CLEANING SWITCH 1
SWITCH 2 CLEANING
31
D8D9
3
2
12
3 32
1
2
0.01µ
C22
16V
2
0.01µ
C10
16V
22K
R6 20K
Q2
1
R5
22K R4
R27
2
1/2W
9
470
R30 SSR2
3
12V
5V
10
9
25V
C24
SW101
2 11
2
8
IC4
10K
D11
D10
RY3
RY2
R29
R28 1.8K
BZ1
RY4
SSR1
1/2W 470
Q4 Q3
IC5
8
9
32
1 1
32
Q1
16V 220µ
10K(F)
+
D6
25V
0.1µ
1 2 4 5 3
MOTOR LOUVER
3 2 1 5 4
1 2 3
HOLE
IC
FAN MOTOR
2
3
JP3 JP2 JP1
NC
MB89537A
1
IC6
3
10K
13K 13K
25V
0.1µ
1µ50V
IC1
(PATTERN SIDE)
400V
0.01µ
16V
JP5 JP4
1K
0.01µ
SSR1
OSC1
FRONT
P21 P22 P23 P24 P25 P26 P27 X1 X0
MOD1 MOD0
RST
32 31 30 29 28 27 26 25 24 23 22 21 20
Vcc
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
P45
P46
P47
AN0
AN1
AN2
AN3
AN4
AN5
AN6
AN7
AVR
P60
P61
P62
P63
P64
P31 P32 P33 P34 P35 P36 P37 P40 P41 P42 P43 P44
52 53 54 55 56 57 58 59 60 61 62 63 64
P30
NC
P00
P01
P02
P03
P04
P05
P06
P07
P10
P11
P12
P13
P14
P15
P16
P17
P20
49
50
51
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
AVcc
AVss
Vss
50V 1000p
+
680
10K 10K
10µ
16V16V
10µ
10k
(F) 10K
(F)
4 3 2 1TH2
PIPE TEMP. 15kΩ(25˚C) TH1 PIPE TEMP. 10kΩ(25˚C)
FAN
MOTOR
2µ
1 3 5
2.7K(F)
D7
+
35V
1000µ
50V
0.1µ
7812
IC2
+
25V 47µ
7805
0.1µ
IC3
25V 10V
100µ
+
C7
D1?4
GND
22.6K(F)
3.3K
45
IC8
1 2 3
8 7 6
0.1µ25V
16V 0.01µ
TR1
C1
C2
C3
C4 C5
C6 C8
C9
C11
C13 C14 C15 C17
C18 C19
C20
C21
C23
C25
R7 R8
R9
R10
R13 R14
R15
R16
R18 R19 R20 R21 R22 R23
R24 R25
R26
R32
R34
10K
16V 16V 16V
0.01µ 0.01µ 0.01µ
6.8K
R12
47K
R11
10MHz
JP10
JP11
JP12
JP13
JP18
10K
10K
0.01µ
16V
0.01µ
16V
R17
3.3K
13K
C27
R37
C12
SW1 : AUX.(TEST RUN)
C16
25V
0.1µ
1
R31R33
+
+
C26
3 2 1 1
BCN1
2 3 4 5 6 7 8
L
FAN
WPE1
T
250V 3A
1 N
BOARD TERMINAL
L
N
PHASE SINGLE SUPPLY POWER
2 3 4
TERMINAL BOARD
VALVE
COMP
A B C D E
BR
UNIT OUTDOOR TO
47 R45
1/2W
DEF. SYMBOL
I
JP2 JP3 JP4 JP5JP1
NONENONENONE
R38
MODE
JP18
15K 15KNONENONE
JP19
LOUVOUT
FAN
CLUS TER ER
R19 R21 R23
FAN2FAN1
HEAT COOL
JP6
NONE
E 1
DEIC E 2
DRY FAN
PIPE 1
PIPE 2
JP7 JP8 JP9 JP10 JP11 JP12 JP13
NONENONENONENONENONE
TEST
DEIC
ON PWR
LESS WIRE
AT SWE-
KEEP HOT
CT1
BL
BL
PU
OR RE
BR

13
AH/AY-AP18DR
AH/AY-AP24DR
Figure L-3. Electronic Control Circuit Diagram for AH-AP18DR
MODE
13K
R37
L2
NC NC
56
L 1
9.1K
R45
1/2W
10K
D14
25V
47
µ
C29
+
NF1
6.8K 6.8K
R41
100
L1
SSR1
C31 1W
275V
0.033
µ
Q8 Q7
Q6 Q5
JP21
3 1 3 1
NR1
CN9
THERMOSTAT
INTERNAL
CN8 CN7
CN6 CN5
CN3
CN2
CN1
1
23
1
CLUSTER
R35
3.3K
R40 R39 10K
CLEANING SWITCH 1
SWITCH 2 CLEANING
31
D8D9
3
2
12
3 32
2
0.01
µ
C22
16V
2
0.01µ
C10
16V
22K
R6 20K
Q2
1
R5
22K R4
R27
2
1/2W
9
470
R30 SSR2
3
12V
5V
10
9
25V
C24
SW101
2 11
2
8
IC4
10K
R29
R28 1.8K
BZ1
RY1
SSR1
1/2W 470
IC5
8
9
Q1
16V 220µ
10K(F)
+
D6
25V
0.1µ
1 2 4 5 3
MOTOR LOUVER
3 2 1 5 4
1 2 3
HOLE
IC
FAN
MOTOR
2
3
JP3 JP2 JP1
NC
MB89537A
1
IC6
3
10K
13K 13K
25V
0.1
µ
1 µ
50V
IC1
(PATTERN SIDE)
400V
0.01µ
16V
JP5 JP4
1K
0.01
µ
OSC1
FRONT
P21 P22 P23 P24 P25 P26 P27 X1 X0
MOD1 MOD0
RST
32 31 30 29 28 27 26 25 24 23 22 21 20
Vcc
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
P45
P46
P47
AN0
AN1
AN2
AN3
AN4
AN5
AN6
AN7
AVR
P60
P61
P62
P63
P64
P31 P32 P33 P34 P35 P36 P37 P40 P41 P42 P43 P44
52 53 54 55 56 57 58 59 60 61 62 63 64
P30
NC
P00
P01
P02
P03
P04
P05
P06
P07
P10
P11
P12
P13
P14
P15
P16
P17
P20
49
50
51
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
AVcc
AVss
Vss
50V 1000p
+
680
10K 10K
10
µ
16V16V
10
µ
10k
(F) 10K
(F)
4 3 2 1TH2
PIPE TEMP 15kΩ(25˚C). TH1 PIPE TEMP 10kΩ(25˚C).
FAN
MOTOR
2µ
1 3 5
2.7K(F)
D7
+
35V
1000µ
50V
0.1µ
7812
IC2
+
25V 47µ
7805
0.1µ
IC3
25V 10V
100µ
+
C7
D1?4
GND
22.6K(F)
3.3K
45
IC8
1 2 3
8 7 6
0.1µ25V
16V 0.01µ
TR1
C1
C2
C3
C4 C5
C6 C8
C9
C11
C13 C14 C15 C17
C18 C19
C20
C21
C23
C25
R7 R8
R9
R10
R13 R14
R15
R16
R18 R19 R20 R21 R22 R23
R24 R25
R26
R32
R34
10K
16V 16V 16V
0.01µ 0.01µ 0.01µ
6.8K
R12
47K
R11
10MHz
JP10
JP11
JP12
JP13
JP18
10K
10K
0.01µ
16V
0.01 µ
16V
R17
3.3K
13K
C27
C12
SW1 : AUX.(TEST RUN)
C16
25V
0.1
µ
1
R31R33
+
+
C26
3 2 1 1
BCN1
2 3 4 5 6 7 8
R37
6 7 1 3 5
1K(F)
1
0.1µ
D12
3
R108
10
32
(TIMER)
LED102 LED101
(OPERATION)
1
12
BL
GR LED107
(CLUSTER)
134256
9
R107
(FAN L) (FAN M) (FAN H)
(FAN AUTO)
LED106 LED105 LED104 LED103
3K
2.7K
R102 R101
1/2W 1/2W
C102
C101
0.1µ
25V
33µ
10V
+
IC101
BCN101
R103 R104 R105 R106
620 620
1 2 3 1 8 7 6 5 4 3 2
620 620
1/2W 1/2W
56
CN10
CN103
BCN102
CN102
CN101
275V
275V
0.1
µ
0.1 µ
275V C28
86
SSR2
2W 2W
R1 R2
NC
NC
NC
NC
JP9
JP8
JP7
JP19
DEIC E 1
DEIC E 2
DRY FAN
PIPE 1
PIPE 2
NONENONENONENONE
JP7 JP8 JP9 JP10 JP11 JP12 JP13
TEST
NONE
JP6
NONE 15K 15K 15K
JP18 JP19
LOUVOUT
FAN
CLUS TER ER
R19 R21 R23
FAN2FAN1
HEAT COOL
MODE
R38
R38
ON PWR
LESS WIRE
AT SWE-
KEEP HOT
DEF. SYMBOL
I
JP2 JP3 JP4 JP5JP1
IN OUT
RY1
WPE1
T
250V 3A
1 N
BOARD TERMINAL
L
N
PHASE SINGLE SUPPLY POWER
TERMINAL BOARD
A
BL
BK
BR
UNIT OUTDOOR TO
NONENONENONE
47
CT1
BL
BL

AH/AY-AP18DR
AH/AY-AP24DR
14
Figure L-4. Electronic Control Circuit Diagram for AH-AP24DR
L2
R37
13K
MODEHOT
KEEP
SWE- AT
WIRE LESS
PWR ON
DEIC
TEST
NONE NONE NONE NONE
JP13JP12JP11JP10
JP9JP8JP7
2 PIPE
1 PIPE
FAN DRY
E 2 DEIC
E 1
NONE
JP6
COOLHEAT
FAN1 FAN2
R23R21R19
ERTER
CLUS
FAN OUT LOUV
JP19
NONE 15K15K
JP18
MODE L
R38
NONE NONE NONE
JP1 JP5JP4JP3JP2
I
SYMBOL DEF.
1/2W
R4547
TO OUTDOOR UNIT
BR
E A
BOARD TERMINAL
2
POWER SUPPLY SINGLE PHASE
N
L
TERMINAL BOARD
N 1
3A 250V
T
WPE1
8 7 6 5 4 3 2
BCN1
1 1 2 3
C26
+
+
R33 R31
1
0.1µ25V
C16
SW1 : AUX.(TEST RUN)
C12
R37
C27
13K 3.3K
R17
16V 0.01µ
16V 0.01µ
10K
10K
JP18
JP13
JP12
JP11
JP10
10MHz
R11 47K
R12 6.8K
0.01µ 0.01µ 0.01µ
16V 16V 16V 10K
R34 R32
R26
R25 R24
R23
R22
R21
R20
R19
R18
R16
R15
R14
R13
R10
R9
R8
R7
C25
C23
C21
C20
C19 C18 C17C15
C14 C13
C11
C9
C8C6
C5
C4
C3
C2
C1
TR1
0.01µ
16V
25V
0.1µ
6 7 8
3 2 1
IC8
5
4
3.3K
22.6K(F)
GND
D1?4
C7
+
100µ
10V
25V
IC3
0.1µ
7805
47µ 25V
+
IC2
7812
0.1µ
50V
1000µ
35V
+
D7
2.7K(F)
5 3 1
2µ
MOTOR
FAN
1 2 3 4
(F)
10K
(F)
10k
10µ
16V 16V
10µ
10K10K
680
+
1000p
50V
Vss
AVss
AVcc
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
51
50
49
P20
P17
P16
P15
P14
P13
P12
P11
P10
P07
P06
P05
P04
P03
P02
P01
P00
NC
P30
64 63 62 61 60 59 58 57 56 55 54 53 52
P44 P43 P42 P41
P40 P37 P36 P35 P34 P33 P32 P31
P64
P63
P62
P61
P60
AVR
AN7
AN6
AN5
AN4
AN3
AN2
AN1
AN0
P47
P46
P45
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
Vcc
20 21 22 23 24 25 26 27 28 29 30 31 32
RST
MOD0 MOD1
X0 X1 P27 P26 P25 P24 P23 P22 P21
FRONT
OSC1
SSR1
0.01µ
1K
JP4 JP5
16V 0.01µ
400V
(PATTERN SIDE)
IC1
50V
1µ
0.1µ25V
13K 13K
10K
3
IC6
1
MB89537A
NC
JP1 JP2 JP3
3
2
MOTOR
FAN
IC
HOLE
3 2 1
4 5 1 2 3LOUVER
MOTOR
3 5 4 2 1
0.1µ
25V
D6 +
10K(F)
220µ 16V
Q1
9
8IC5
470
1/2W
SSR1
RY4
BZ1
1.8K
R28
R29
10K
IC4
8
2 11
2SW101
C24
25V
9
10
5V
12V
3
SSR2
R30
470
9
1/2W 2
R27
R4 22K
R5
1
Q2
20K R6
22K
16V
C10
0.01µ
2
16V
C22
0.01µ
2
12
3 32
1
23
D9 D8
13
CLEANING SWITCH 2
SWITCH 1 CLEANING
10K R39 R40
3.3K
R35
CLUSTER
13
2
1
CN1
CN2
CN3
CN5 CN6
CN7 CN8
INTERNAL
THERMOSTAT
CN9
NR1
1 3 1 3
JP21
Q5 Q6
Q7Q8
6 7 1 3 5
820(F)
0.1µ
D12
56
56
1/2W 1/2W
620 620
2 3 4 5 6 7 8 1 3 2 1
620 620 R106
R105 R104 R103
BCN101
IC101
+
10V
33µ25V
0.1µ
C101 C102
1/2W 1/2W
R101 R102
2.7K
3K
LED103 LED104 LED105 LED106
(FAN AUTO)
(FAN H) (FAN M) (FAN L)
R107
9
65 243 1
(CLUSTER)
LED107
GR BL
21
1
(OPERATION)
LED101 LED102
(TIMER)
23
10
R108
3
CN103
BCN102
CN102
CN10
CN101
275V
275V
0.1µ
R2 R1
2W 2W
SSR2
6
8
C28
275V
0.1µ
JP9
JP8
JP7
JP19
R38
NC
NC
NC
NC
L1
100
R41
1W
C31
0.033µ
275V
6.8K 6.8K
NF1
D14
+
C29
47µ
25V
10K
275V
RY4
R44
0.01µ
C34
1W
D
NC NC
47K 5.1K
RE
BL
CT1
BL
BL
BR
TH1 PIPE TEMP. 10kΩ(25˚C) TH2 PIPE TEMP. 15kΩ(25˚C)

15
AH/AY-AP18DR
AH/AY-AP24DR
Figure L-5. Printed Wiring Diagram for AY-AP18DR
2
FB441
2
FB441
2
2
FB441
2
FB441
2
TO TERMINAL BOARD
TOP " N "
TO TERMINAL BOARD
TOP" N "
TO TERMINAL BOARD
BOTTOM" N "
TO TERMINAL
BOARD TOP
" 3 "
TO TERMINAL
BOARD TOP
" 2 "
FROM TERMINAL BOARD
TOP " 1 " " BLACK "
FROM
TERMINAL
BOARD BOTTOM
" L "" BROWN "
FROM FAN MOTOR
FROM
FAN MOTOR
FROM CLUSTER GENERATOR
FROM
CLUSTER
GENERATOR
FROM CLEANING SWITCH 1
FROM
CLEANING
SWITCH 2
FROM THERMISTOR
FROM LOUVER MOTOR
BCN101(BCN201)

AH/AY-AP18DR
AH/AY-AP24DR
16
Figure L-6. Printed Wiring Diagram for AY-AP24DR
2
FB441
2
FB441
2
2
FB441
2
FB441
2
TO TERMINAL BOARD
TOP " N "
TO TERMINAL BOARD
TOP " N "
TO TERMINAL BOARD
BOTTOM " N "
TO TERMINAL
BOARD TOP
" 3 "
TO TERMINAL
BOARD TOP
" 4 "
TO TERMINAL
BOARD TOP
" 2 "
TO TERMINAL
BOARD TOP
" 1 "
FROM FAN MOTOR
FROM
FAN MOTOR
FROM CLUSTER GENERATOR
FROM
CLUSTER
GENERATOR
FROM CLEANING SWITCH 1
FROM
CLEANING
SWITCH 2
FROM THERMISTOR
FROM LOUVER MOTOR
BCN101(BCN201)

17
AH/AY-AP18DR
AH/AY-AP24DR
Figure L-7. Printed Wiring Diagram for AH-AP18DR
2
FB441
2
FB441
2
2
FB441
2
FB441
2
TO TERMINAL
BOARD TOP " N "
TO TERMINAL BOARD
TOP " N "
TO TERMINAL BOARD
BOTTOM " N "
FROM TERMINAL
BOARD TOP " 1 " " BLACK "
FROM
TERMINAL
BOARD BOTTOM
" L " " BROWN "
FROM FAN MOTOR
FROM
FAN MOTOR
FROM CLUSTER GENERATOR
FROM
CLUSTER
GENERATOR
FROM CLEANING SWITCH 1
FROM
CLEANING
SWITCH 2
FROM THERMISTOR
FROM LOUVER MOTOR
BCN101(BCN201)

AH/AY-AP18DR
AH/AY-AP24DR
18
Figure L-8. Printed Wiring Diagram for AH-AP24DR
2
FB441
2
FB441
2
2
FB441
2
FB441
2
TO TERMINAL BOARD
TOP " N "
TO TERMINAL BOARD
TOP " N "
TO TERMINAL BOARD
BOTTOM " N "
TO TERMINAL
BOARD TOP
" 2 "
TO TERMINAL
BOARD TOP
" 1 "
FROM FAN MOTOR
FROM
FAN MOTOR
FROM CLUSTER GENERATOR
FROM
CLUSTER
GENERATOR
FROM CLEANING SWITCH 1
FROM
CLEANING
SWITCH 2
FROM THERMISTOR
FROM LOUVER MOTOR
BCN101(BCN201)

19
AH/AY-AP18DR
AH/AY-AP24DR
FUNCTIONS
AH-AP18DR/AP24DR are noty provided with the
heating function
1. Temperature control characteristic
1-1 COOL operation
In the “COOL” mode, the thermostat circuit is
controlled by four thermostat lines (C1 thru C5).
Figure Y-1
1-2 DRY operation
In the “DRY” mode, the thermostat circuit is
controlled by three thermostat lines (D1 thru D3).
Figure Y-2
1-3 HEAT operation
In the “HEAT” mode, the thermostat circuit is
controlled by six thermostat lines (H01 thru H4).
Figure Y-3
2. Operation modes
2-1 COOL operation
The compressor turns on or off, at the thermostat
lines C3 and C4. The outdoor fan motor is also
controlled with the compressor.
Figure Y-4
18 32
C1
C2
C3
C4
17.5
18.5
19.5
19.0
20.5
31.5
33.0
32.5
33.5
34.5
Preset temperature (˚C)
Room temperature (˚C)
C5
Room temperature(˚C)
Preset temperature (˚C)
18 32
D1
D2
D3
17.5
18.5
19.5
31.5
32.5
33.5
Preset temperature (˚C)
H4
H3
H2
H1
H02
H01
17.5
18.5
20
21
22
23
31.5
32.5
34.0
35.0
36.0
37.0
18 32
Room temperature(˚C)
Room temperature
Preset temperature
Room
temperature
transition
C4
C5
States 1 & 3 : Compressor ON
State 2 : Compressor OFF
1
2
3

AH/AY-AP18DR
AH/AY-AP24DR
20
2-2 DRY operation
On the switch on, the compressor always starts to
operate for 2 minutes with fan speed "DL" .
The microcomputer reads the room temperature 2
minutes after this first compressor operation.
This room temperature is set as the preset
temperature automatically.
The preset temperature ranges from 18˚C to
32˚C. When the room temperature is below 18˚C,
the preset temperature is set to 18˚C, and when
the room temperature is over 32˚C, the preset
temperature is set to 32˚C.
Dry operation is divided into three zones (Cooling
zone, Dehumidifying zone and Circulating zone)
by thermostat lines (D1 to D3), and the
compressor and the fan motor are controlled in
each zone as shown in Table Y-1.
Table Y-1
2-3 Heat operation
The compressor turns on or off, at State 2 , turns on
continuously at State 1 & 3 .
Figure Y-5
Figure Y-6
3. Fan speed
Fan speeds are given by the indoor fan motor, "DL"~"HH" which are available in the following operation mode.
Table Y-2
Fan switch
DL
Fan speed Fan switch (AUTO) 18DR TYPE
AY AH AY AH
(r.p.m.)
750 750 830 830
780 780 860 860
820 820 960 960
840 840 980 980
940 940 1030 1030
1000 1000 1120 1120
1050 1050 1210 1210
720 730
840 930
870 960
940 1080
1010 1150
1050 1210
24DR TYPE
DH DRY
COOL
CL COOL SOFT
CAL
CM COOL LOW
CAH
CH COOL HIGH
HUL
HL HEAT SOFT
HEAT
HAL
HM HEAT LOW
HAH
HH HEAT HIGH
Room temperature
Preset temperature
Room
temperature
transition
D3
D2
D1
States 1 & 5 : Cooling zone
States 2 & 4 : Dehumidifying zone
States 3 : Circulating zone
3
4
5
1
2
Room temperature
Preset temperature
Room
temperature
transition
States 1 & 3 : Compressor ON
States 2 : Compressor OFF/(ON)
(Hot-keep function)
H1
H2
3
1
2
Compressor
Cooling zone
Dehumidifying zone
Circulating zone
Fan speed
ON "DH"
"DL"
"DL" or OFF
ON
OFF